8970421 has 2 divisors, whose sum is σ = 8970422. Its totient is φ = 8970420.

The previous prime is 8970389. The next prime is 8970427. The reversal of 8970421 is 1240798.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8346321 + 624100 = 2889^2 + 790^2 .

It is a cyclic number.

It is not a de Polignac number, because 8970421 - 2⁵ = 8970389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8970427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4485210 + 4485211.

It is an arithmetic number, because the mean of its divisors is an integer number (4485211).

Almost surely, 2^8970421 is an apocalyptic number.

It is an amenable number.

8970421 is a deficient number, since it is larger than the sum of its proper divisors (1).

8970421 is an equidigital number, since it uses as much as digits as its factorization.

8970421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 8970421 is about 2995.0661094540. The cubic root of 8970421 is about 207.7802551700.

The spelling of 8970421 in words is "eight million, nine hundred seventy thousand, four hundred twenty-one".